NIAID Primary Immune Deficiency Clinic

The NIAID Primary Immune Deficiency (PID) Clinic is located at the National Institutes of Health (NIH) Clinical Center and is dedicated to research on the more than 200 forms of primary immune deficiency diseases affecting approximately 500,000 people in the United States.

Clinical Trials Sponsored by the Primary Immune Deficiency Clinic

The clinical trials and studies conducted by the Primary Immune Deficiency Clinic change frequently, but you can see a list of all current clinical trials and studies being conducted by the Primary Immune Deficiency Clinic on our Find a Clinical Trial page.

View Trials

The clinic accepts patients who are at least 2 years old who have a known or suspected primary immune deficiency disease.

Before Your Visit

If you are interested in coming to the PID Clinic, discuss this option with your personal physician or specialist.

You must be referred to the PID Clinic by your doctor. Your doctor will need to send the PID Clinic staff the following information:

  • A summary letter describing your condition and current health status
  • A list of treatments and medicines you have taken
  • Copies of your complete medical records

Send the requested information and records by FedEx to:

National Institutes of Health
10 Center Drive
Building 10, Room 12C-103
Bethesda, MD 20892-1899
Attn: Carla Williams, RN
Phone: 301–496–4000

Our clinicians will notify your doctor and you of their decision by mail in about 6 to 8 weeks. If our clinicians determine that you would benefit from coming to the PID Clinic, you and your family will then be invited. Our clinical staff will send you a copy of the NIH Patient Handbook and a copy of the NIH Screening Consent prior to your visit to NIH.


Your visit to the clinic is free, so there is no need to worry if your insurance will cover your visit. However, your initial travel expenses will not be covered.

For those arriving from outside the Washington, DC, metro area, some overnight housing is available on the NIH campus at the Children’s Inn. There are also many hotels and motels convenient to public transportation in the area.

During Your Visit

Plan to stay for at least one full day (approximately eight hours) of testing and evaluation. Some diagnostic tests take two days to complete, so you may need to return to the clinic for a half-day follow-up visit.

During your visit, you can expect the following:

  • Initial discussion with an NIAID clinician (Day 1)
  • Physical examination (Day 1)
  • Diagnostic tests, including blood work, CT scan, or MRI, if needed (Day 1 to 2)
  • Wrap-up session to review your test results, treatment recommendations, and diagnosis (Day 1 or 2)

Genome Sequencing

Any patient of the PID clinic is eligible to receive genome sequencing and associated services through the NIAID Centralized Sequencing Program. Patients interested in participating in the sequencing process can visit the NIAID Centralized Sequencing Program page for eligibility criteria and contact information.


Of Special Interest to Parents (NIH Clinical Center)

For Parents and Children (NIH)

Services Available at NIH

The NIH Clinical Center provides many services to its visitors, including counseling, a business center, and recreation. For details, visit the NIH Clinical Center Patient Services website.

Follow-up Care

Our staff is committed to helping you better manage your disease.

After your exam at the clinic is complete, you may be offered the opportunity to participate in ongoing clinical trials at NIAID. Only our clinicians can determine if you are eligible to participate.

Alternatively, you may be informed of primary immune deficiency diseases studies for which you may be eligible at clinical centers outside of NIAID.

Read More About the Research

Learn more about NIAID's research on primary immune deficiency diseases.

What is it Like to Participate?

Photo of Tony R. Lee

The best part of participating in the trial was seeing the staff during each visit: they were so upbeat, kind, and thankful. I felt as though I was part of a team that would change the world—and I know it will.

– Tony Lee

Contact Information

National Institutes of Health
10 Center Drive
Building 10, Room 12C-103
Bethesda, MD 20892-1899
Attn: Carla Williams, RN
Phone: 301–496–4000

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